# Curiosity

> American robotic rover exploring Gale Crater on Mars

**Wikidata**: [Q48485](https://www.wikidata.org/wiki/Q48485)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Curiosity_(rover))  
**Source**: https://4ort.xyz/entity/curiosity

## Summary
Curiosity is an American robotic rover exploring Gale Crater on the surface of Mars. Operated by NASA as part of the Mars Science Laboratory (MSL) mission, its primary purpose is the scientific exploration of the planet. The car-sized rover landed on Mars on August 6, 2012, to study the Martian climate and geology.

## Key Facts
- **Type:** Robotic Mars rover
- **Mission:** Mars Science Laboratory (MSL)
- **Operator:** National Aeronautics and Space Administration (NASA)
- **Launch Date:** November 26, 2011
- **Landing Date:** August 6, 2012
- **Landing Site:** Gale Crater, Mars
- **Launch Mass:** 899 kg
- **Dimensions:** 3.0 m long, 2.8 m wide, 2.1 m high
- **Power Source:** Multi-mission radioisotope thermoelectric generator
- **Preceded By:** Spirit, Opportunity
- **Succeeded By:** Perseverance

## FAQs
### Q: What is the Curiosity rover?
A: Curiosity is a robotic rover sent by NASA to explore Gale Crater on Mars. It is the centerpiece of the Mars Science Laboratory (MSL) mission and is designed to function as a mobile science lab, analyzing the planet's environment.

### Q: When did Curiosity land on Mars?
A: The Curiosity rover landed in Gale Crater on Mars on August 6, 2012. The specific landing site is named Bradbury Landing.

### Q: How big is the Curiosity rover?
A: The Curiosity rover is approximately 3.0 meters (9.8 feet) long, 2.8 meters (9.2 feet) wide, and 2.1 meters (6.9 feet) high. It had a launch mass of 899 kilograms (1,982 pounds).

## Why It Matters
Curiosity represents a significant advancement in the exploration of Mars. As a mobile, long-duration "Mars Science Laboratory," its primary role is to assess whether Mars ever had an environment able to support small life forms called microbes. The rover's sophisticated suite of scientific instruments allows for unprecedented, in-situ analysis of Martian rocks, soil, and atmosphere.

By drilling into rocks and analyzing the powdered samples, Curiosity investigates the planet's geological history and the past and present role of water. Its findings are crucial for understanding the potential habitability of Mars, which directly informs the planning for future robotic and human missions. The mission's data on Martian radiation, weather, and geology provides foundational knowledge for ensuring the safety of future astronauts and the success of sustained exploration efforts on the Red Planet.

## Notable For
- **Nuclear Power Source:** Curiosity is powered by a multi-mission radioisotope thermoelectric generator (MMRTG), which gives it a long operational lifespan independent of solar power, unlike its predecessors Spirit and Opportunity.
- **Advanced Scientific Payload:** The rover carries a comprehensive suite of ten scientific instruments, including a laser-firing camera (ChemCam), an X-ray diffraction instrument (CheMin), and a full chemistry lab (Sample Analysis at Mars, or SAM), making it the most advanced mobile laboratory sent to another planet at the time of its launch.
- **Targeted Exploration Site:** The mission was specifically designed to explore Gale Crater, a site chosen for its diverse terrain and a central mountain (Mount Sharp) that exposes layers of Martian history for scientific investigation.
- **Complex Landing Sequence:** Curiosity successfully executed a novel and complex landing sequence involving a guided atmospheric entry, a supersonic parachute, and a "sky crane" maneuver that lowered the rover to the surface on tethers.

## Body
### Mission and Operation
- **Official Name:** Mars Science Laboratory (MSL)
- **Purpose:** Exploration of Mars
- **Operator:** National Aeronautics and Space Administration (NASA)
- **Manufacturer:** Jet Propulsion Laboratory (JPL)
- **Country of Origin:** United States
- **Earth-based Testbed:** MAGGIE serves as an operational testbed for the Curiosity rover.

### Rover Specifications
- **Launch Mass:** 899 kg
- **Dimensions:** 3.0 m (length) x 2.8 m (width) x 2.1 m (height)
- **Power Source:** Multi-mission radioisotope thermoelectric generator (MMRTG)

### Launch and Landing
- **Launch Date:** November 26, 2011, at 15:02:00 UTC
- **Launch Site:** Cape Canaveral Space Launch Complex 41
- **Launch Vehicle:** Atlas V 541
- **Launch Contractor:** United Launch Alliance
- **Landing Date:** August 6, 2012, at 05:17:57 UTC (Spacecraft Event Time)
- **Landing Location:** Gale Crater, Mars
- **Specific Landing Site:** Bradbury Landing

### Scientific Instruments
Curiosity carries a suite of advanced scientific instruments to analyze the Martian environment:
- **Mastcam:** A mast-mounted camera system.
- **Mars Hand Lens Imager (MAHLI):** A robotic arm-mounted camera for close-up images.
- **Mars Descent Imager (MARDI):** A camera that captured the rover's descent to the surface.
- **Alpha Particle X-ray Spectrometer (APXS):** Determines the elemental composition of rocks and soils.
- **Chemistry & Camera (ChemCam):** Uses a laser to vaporize materials and analyze their composition.
- **Chemistry & Mineralogy X-Ray Diffraction (CheMin):** Identifies and quantifies the minerals in rocks and soil.
- **Sample Analysis at Mars (SAM):** A suite of instruments that can detect organic compounds.
- **Radiation Assessment Detector (RAD):** Characterizes the Martian radiation environment.
- **Dynamic Albedo of Neutrons (DAN):** Measures hydrogen (indicating water) in the subsurface.
- **Rover Environmental Monitoring Station (REMS):** A weather station that measures atmospheric conditions.

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## References

1. [Launch. 2011](http://mars.jpl.nasa.gov/msl/mission/timeline/launch/)
2. Jonathan's Space Report
3. [Source](https://mars.nasa.gov/msl/spacecraft/rover/power/)
4. 2011 Mars Science Laboratory trajectory reconstruction and performance from launch through landing
5. [Source](https://www.nbcnews.com/id/wbna48540619)
6. [Source](https://science.nasa.gov/mission/msl-curiosity/location-map/)
7. [Source](https://mars.nasa.gov/msl/timeline/edl/)
8. [Source](https://mars.nasa.gov/maps/location/?mission=Curiosity)
9. [Source](https://mars.nasa.gov/msl/spacecraft/instruments/mastcam/)
10. [Source](https://mars.nasa.gov/msl/spacecraft/instruments/mahli/)
11. [Source](https://mars.nasa.gov/msl/spacecraft/instruments/mardi/)
12. [Source](https://mars.nasa.gov/msl/spacecraft/instruments/apxs/)
13. [Source](https://mars.nasa.gov/msl/spacecraft/instruments/chemcam/)
14. [Source](https://mars.nasa.gov/msl/spacecraft/instruments/chemin/)
15. [Source](https://mars.nasa.gov/msl/spacecraft/instruments/sam/)
16. [Source](https://mars.nasa.gov/msl/spacecraft/instruments/rad/)
17. [Source](https://mars.nasa.gov/msl/spacecraft/instruments/dan/)
18. [Source](https://mars.nasa.gov/msl/spacecraft/instruments/rems/)
19. [Source](https://www.jpl.nasa.gov/news/press_kits/MSLLanding.pdf)
20. [Source](https://mars.nasa.gov/msl/spacecraft/rover/summary/)
21. [Source](https://www.zhihu.com/search?q=%E6%9C%BA%E9%81%87%E5%8F%B7%E7%81%AB%E6%98%9F%E8%BD%A6%E3%80%81&type=topic#机遇号永久失联&机遇号火星车永久失联)